Unnecessary Blood Transfusion Prolongs Length of Hospital Stay of Patients Who Undergo Free Fibular Flap Reconstruction of Mandibulofacial Defects: A Propensity Score-Matched Study.

PURPOSE: Blood transfusion is usually a common clinical practice in flap transfer surgery because of its invasive hemorrhagic nature. Although intraoperative restrictive transfusion policy was suggested in vascularized fibular flap reconstruction, its clinical evidence was still insufficient. Therefore, our study aimed to investigate the influence of intraoperative blood transfusion on length of stay (LOS) after vascularized fibular flap reconstruction. PATIENTS AND METHODS: Patients who underwent vascularized fibular flap reconstruction of mandibulofacial defects between 2012 and 2018 were reviewed. Univariate and multivariate analyses were performed to identify factors that influenced LOS. The identified factors and other perioperative factors that may influence transfusion decision were included in propensity score matching to explore the independent impact of intraoperative blood transfusion on LOS. RESULTS: About 375 patients were included, and the median LOS was 14.00 (12.00, 19.00) days in our study. Multivariate analysis suggested that duration of surgery, fluid infusion speed for more than 24 hours on operative day, intraoperative blood transfusion, and postoperative complication were associated with prolonged LOS (P < .05). Propensity score matching was performed, and the difference of LOS between the matched transfused and nontransfused group was statistically significant (15.00 [12.75, 20.00] vs 14.00 [11.75, 16.25]; P < .001). The comparison between the matched and unmatched transfused patients indicated that the former has less radiotherapy history, blood loss, and higher preoperative hemoglobin (P ≤ .001). CONCLUSIONS: Intraoperative blood transfusion is independently associated with prolonged LOS in patients without preoperative anemia, radiotherapy history, or intraoperative massive hemorrhage who undergo vascularized fibular flap reconstruction. Efforts should be made to avoid unnecessary intraoperative blood transfusion, and our results support consideration of a restrictive transfusion policy in these patients.